64388312694 has 16 divisors (see below), whose sum is σ = 143085139440. Its totient is φ = 21462770880.

The previous prime is 64388312689. The next prime is 64388312741. The reversal of 64388312694 is 49621388346.

64388312694 is a `hidden beast` number, since 6 + 438 + 83 + 126 + 9 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1192376161 = 64388312694 / (6 + 4 + 3 + 8 + 8 + 3 + 1 + 2 + 6 + 9 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 64388312694.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 596188027 + ... + 596188134.

It is an arithmetic number, because the mean of its divisors is an integer number (8942821215).

Almost surely, 2^64388312694 is an apocalyptic number.

64388312694 is an abundant number, since it is smaller than the sum of its proper divisors (78696826746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64388312694 is a wasteful number, since it uses less digits than its factorization.

64388312694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192376172 (or 1192376166 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The spelling of 64388312694 in words is "sixty-four billion, three hundred eighty-eight million, three hundred twelve thousand, six hundred ninety-four".